362 On a new Fish from British Central Africa. 
28. Labeo barbatus. 
Bouleng. Ann. Mus. Congo, Zool. i. p. 36, pl. xix. fig. 2 (1898), and 
Poiss. Bass. Congo, p. 218 (1901). 
Congo. 
29. Labeo capensis. 
Abrostomus capensis, A. Smith, Il. Zool. S. Afr., Fish. pl. xii. fig. 2 
(1841). 
? Labeo cafer, Castelnau, Mém. Poiss. Afr. Austr. p. 60 (1861). 
Labeo tenuirostris, Steind. Sitzh. Ak. Wien, cili. 1894, p. 459, pl. v. 
fio, 2. 
Orange R., Limpopo R. 
30. Labeo umbratus. 
Abrostomus umbratus, A. Smith, Ill. Zool. 8, Afr., Fish. pl. xu. fig. 1 
(1841). 
Labeo Sicheli, Castelnau, Mém. Poiss. Afr. Austr. p. 60 (1861). 
Orange R. System. 
Of these 30 species, according to our present knowledge of 
their distribution, 11 are peculiar to the Congo System, 7 to 
East Africa east of the Nile System, southwards to the 
Zambesi (including Lake Nyassa), 4 to the Nile System, 4 to 
South Africa (Limpopo and Orange Rivers), 2 to West Africa 
from the Niger northwards, 1 to the Cameroon District ; 
and one species is common to the Nile System and to the 
Senegal-Niger. 
XX XV.—Description of anew Silurid Fish of the Genus 
Clarias from British Central Africa. By G. A. Bou- 
LENGER, F.R.S. 
Clarias Carsonit. 
Depth of body 7 times in total length, length of head 4}. 
Head 14 as long as broad, smooth ; occipital process angular ; 
frontal fontanelle sole-shaped, 24 as long as broad, 4 times in 
length of head; occipital fontanelle small, encroaching a 
little on occipital process; eye very small, 4 times in length 
of snout, 7 times in interorbital width ; width of mouth a 
little less than interorbital width, 2 length of head; vomerine 
teeth conical, forming a crescentic band which is about as 
broad as the premaxillary band; nasal barbel $ length of 
head; maxillary barbel 3 length of head, not reaching gill- 
